PATH:
usr
/
lib64
/
python3.6
/
site-packages
/
cryptography
/
hazmat
/
primitives
/
kdf
/
__pycache__
/
Editing: pbkdf2.cpython-36.opt-1.pyc
3 l�_� � @ s� d dl mZmZmZ d dlmZ d dlmZmZm Z m Z d dl m Z d dl mZ d dlmZ d dlmZ eje�G dd � d e��Zd S ) � )�absolute_import�division�print_function)�utils)�AlreadyFinalized� InvalidKey�UnsupportedAlgorithm�_Reasons)� _get_backend)�PBKDF2HMACBackend)� constant_time)�KeyDerivationFunctionc @ s& e Zd Zddd�Zdd� Zdd� ZdS ) � PBKDF2HMACNc C sp t |�}t|t�s tdtj��|j|�s<tdj|j�tj ��d| _ || _ || _ t jd|� || _|| _|| _d S )Nz4Backend object does not implement PBKDF2HMACBackend.z/{} is not supported for PBKDF2 by this backend.F�salt)r � isinstancer r r ZBACKEND_MISSING_INTERFACEZpbkdf2_hmac_supported�format�nameZUNSUPPORTED_HASH�_used� _algorithm�_lengthr � _check_bytes�_salt� _iterations�_backend)�self� algorithmZlengthr Z iterationsZbackend� r � /usr/lib64/python3.6/pbkdf2.py�__init__ s" zPBKDF2HMAC.__init__c C s< | j rtd��d| _ tjd|� | jj| j| j| j| j |�S )Nz'PBKDF2 instances can only be used once.T� key_material) r r r Z_check_bytesliker Zderive_pbkdf2_hmacr r r r )r r r r r �derive- s zPBKDF2HMAC.derivec C s" | j |�}tj||�s td��d S )NzKeys do not match.)r r Zbytes_eqr )r r Z expected_keyZ derived_keyr r r �verify; s zPBKDF2HMAC.verify)N)�__name__� __module__� __qualname__r r r! r r r r r s r N)Z __future__r r r Z cryptographyr Zcryptography.exceptionsr r r r Z cryptography.hazmat.backendsr Z'cryptography.hazmat.backends.interfacesr Z cryptography.hazmat.primitivesr Z"cryptography.hazmat.primitives.kdfr Zregister_interface�objectr r r r r �<module> s
SAVE
CANCEL